Polyurethane Foam
PORON® 4701-50 (Firm)
Firm polyurethane foam for gasketing, sealing, cushioning, and impact-management applications
PORON® 4701-50 is a firm microcellular polyurethane foam designed for applications that need higher energy management and more support than softer 4701 grades. It is a strong option for designs that require firmer compression performance and long-term durability.
For applications that need a balance of firmness, cushioning, and compression recovery, PORON® 4701-50 performs well in sealing, gasketing, and shock-management roles.
Why Choose PORON® 4701-50
- Firm polyurethane foam for gasketing and high-energy impact management
- Available in 15, 20, and 30 lb/ft³ density options
- Published thickness range from 0.012 in. to 0.500 in.
- Excellent compression set resistance for long-term performance
- Good fit for designs that need durable shock and impact management
- Maintains integrity through repeated loading and changing temperatures
Common Applications for PORON® 4701-50
PORON® 4701-50 is commonly used where firmer support and energy management matter more than very low closure force.
- Gaskets and seals
- High-energy impact-management components
- Cushioning and shock-management parts
- Gap-filling applications requiring a firmer material
- Assemblies exposed to repeated loading
- Applications with changing temperature conditions
Available 4701-50 Material Options
PORON® 4701-50 is available in multiple constructions.
- PORON® 4701-50 Firm
- PORON® 4701-50 Firm Thin as Cast Materials
- PORON® 4701-50 Firm Supported Materials
- PORON® 4701-50 Firm Global Standards Data Sheet
Custom PORON® 4701-50 Gaskets, Seals & Converted Parts
SRP converts PORON® 4701-50 into custom die-cut gaskets, seals, cushions, and shock-management components for demanding applications. If your design requires firmer support, long-term compression performance, and reliable energy management, our team can help match the right material configuration to your application.
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Need Custom PORON® 4701-50 Gaskets or Converted Parts?
SRP converts PORON® 4701-50 into custom die-cut gaskets, seals, cushions, and shock-management components for demanding applications. Submit your drawing, dimensions, thickness requirements, adhesive needs, and estimated annual usage, and our team will review your project and follow up with a quote.